Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA

Structure of nucleic acids and replication of DNA — practice question

The diagram illustrates the structural outlines of two nucleotide bases found in DNA. These two bases are joined by two hydrogen bonds, which are drawn as dashed lines. Which row correctly names these two nucleotide bases?

  • Anucleotide 1: adenine; nucleotide 2: thymine
  • Bnucleotide 1: cytosine; nucleotide 2: guanine
  • Cnucleotide 1: guanine; nucleotide 2: cytosine
  • Dnucleotide 1: thymine; nucleotide 2: adenine

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